Diabetic foot is one of the very common complications of diabetes. Because diabetic foot is the main cause of amputation and is very harmful, many diabetic patients are afraid of diabetic foot. It is important for diabetic patients to understand the clinical symptoms of diabetic foot to prevent it from happening. So what are the clinical symptoms of diabetic foot? 1, diabetic foot recessive phase: invisible phase diabetic foot symptoms for common extremity blood supply deficiency, local skin swelling, foot appear, numbness, sensory melon dull or partial loss, and accompanied by pain, as if it is obvious at night, the foot artery pulsation is weakened, in the early stage often does not attract the attention of patients. 2, early diabetic foot: the initial diabetic foot symptoms for the plantar or dorsal foot began to appear blisters, blood blisters, often burns or frostbite, corns, etc., resulting in frequent superficial injuries or ulcers on the foot, and redness and swelling, the initial ulcers have less secretions. 3, diabetic foot in the middle: the symptoms of diabetic foot in the middle are repeated infections in the foot, and the degree of infection has further deepened, has damaged the subcutaneous tissue of the foot, and the formation of tissue inflammation. At this time, if not immediately controlled, the infection will spread along the muscle gap in the shape of an inverted triangle, with a gradual increase in purulent secretions and foul-smelling secretions. 4, diabetic foot severe stage: the symptoms of diabetic foot in the severe stage show further aggravation of deep infection, inflammation of cellular tissue fused into a large abscess cavity, muscle tendon ligament damage is serious, purulent secretions and necrotic tissue increase, or deep tissue inflammation combined into a large abscess cavity, around a large area of damaged tissue, bone and joint damage, toe and toe necrosis. Diabetic foot mostly starts from neuropathy, and even without severe limb ischemia, it can lead to foot injury, infection, necrosis, and eventually some even require amputation.